No one is going to provide you the answer, as no one, except you, is able to know what you really want. I think it makes no sense to give you detailed recommendations, as there are few rather good ones already, so let me try to give you a slightly broader perspective.
Obviously, take all responses with a grain of salt, especially mine. No one, except you, is going to experience the wrong decision, and people tend to extrapolate their own experience too much. Let me reassure you, though, that things change. You are going reinvent yourself at least few times in the next decade, or so.
It's very easy to get trapped into thinking that you have to come up with the right decision about your future now. You do not have. You are very lucky you face it now, not ten years later, waking up one day with a mortgage, a well paid job you hate and no time for yourself.
What is really important, though, is to avoid any actions hard or impossible to revert. Specifically, I mean things like becoming seriously addicted to hard drugs, a marriage, a mortgage or a child (and, if you care, everyone will be better off because of a thorougful decision ;-)).
It's impossible to make an informed decision without, well, having some information. Feel free to experiment, as long as you keep in mind the previous point. Your really concious life counts only few years, and it is entirely possible that you have not experienced what you truly love, yet.
It's a cliche but try to follow your instincts, not social pressure or guilt imposed onto you. Everyone knows what is best for everyone, but, at the end of the day, no one will suffer, except potentially your family, from your depression if you decide to go against yourself. A healthly dose of egoism is healthly. You are a free man, and you can do whatever you fucking want, as long as you do not break the law.
When it comes to the drive, try to not confuse your temporary emotions and the long-term ones. Be especially warned about compensating what looks like an eternal unhappiness with other people or any substances. It ends up with junk food, drugs, and staying too long in an eventually destructive relationship.
On the other hand, do not underestimate what I call the instincts, the drive or the things you love. They sound naively, but are pretty powerful. After all, your days are already counted so it makes no sense to waste them because of being afraid not to.
Don't use the inevitable as an excuse. The future is going to surprise you. No one knows what is going to happen in next three, five or ten years. I mean, a decade ago the Internet was nearly non-existent, and journalism was considered a reasonable career. It gets even more puzzling on a microscale, like hurting other people with not meeting their expectations might be exacerbated.
And, with all that praise of listening only to yourself, be a good human being.